Graphical test instrument



FIG. 1 is a perspective view of a graphical test instrument showing my new design;

FIG. 2 is a front plan view;

FIG. 3 is a rear plan view;

FIG. 4 is a right side elevational view;

FIG. 5 is a left side elevational view;

FIG. 6 is a top elevational view;

FIG. 7 is a bottom elevational view; and,

FIG. 8 is a perspective view thereof with the support shown extended. 

The ornamental design for a graphical test instrument, as shown and described. 